13. SUPPORT PIVOT  14. HOSE SUPPORT 
LINK TORSION UPPER 
21. LOCKBOLT  12. BELLCRANK 
20. NUT APEX  19. WASHER SPLINED 
LINK TORSION LOWER 
18. BOLT APEX 
15. WASHER THROUGH-PIN 
17. THROUGH-PIN PIVOT  16. BRACKET CONDUIT 
C Figure 401 (Sheet 3) Bellcrank Assembly Installation

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 32-11-21
 ALL  ú ú 01 Page 404 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 864-029
 WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (2)  Install the ground locks in all landing gear (AMM 09-11-00/201).
 S 494-030
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  
Do this task: "Installation of the Door Locks on the Wing Landing Gear" (AMM 32-00-30/201).

 S 494-031

 (4)  
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).

 S 844-004

 (5)  
Release the pressure from the hydraulic system No. 4 (AMM 29-11-00/201).

 S 034-005

 (6)  
Remove the bolt (5), the nut, the end caps (4), the pin (3) and the nylon washers (2).

 (a)  
Remove the positioning actuator (1) from the bellcrank (12).

 S 034-006
 (7)  
Remove the bolt (11), the nut, the end caps (9), the pin (10).

 (a)  
Remove the positioning link (8) from the bellcrank (12).

 (8)  
Remove the upper conduit bracket from the support bracket.

 S 034-007
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 034-008
 (9)
Loosen the conduit bracket (16) of the electrical conduit.

 S 034-009

 (10)
 Remove the lockbolt (21) to permit the hose support (14) and the support pivot (13) to move out of the apex bolt (18).

 S 034-010

 (11)
 Remove the apex nut (20) and the washer (19).

 S 034-011

 (12)
 Loosen the locknut for the upper torsion link sufficient to permit the bracket (16) to move away from the apex bolt.

 S 024-012

 (13)
 Remove the apex bolt and the through-pin pivot (17) and remove the bellcrank.

 TASK 32-11-21-404-013
 3.  Bellcrank Mechanism Installation (Fig. 401)_________________________________
 A. Consumable Materials
 (1)  
D00633 Grease - BMS 3-33 (preferred)

 (2)  
D00013 Grease - MIL-G-23827 (optional)

 B.
References

 (1)  
AMM 09-11-00/201, Landing Gear Door Locks

 (2)  
AMM 32-00-30/201, Landing Gear Door Locks

 (3)  
AMM 32-11-21/601, Wing Gear Bellcrank Positioning Mechanism

 (4)  
AIPC 32-11-21 Fig. 1

 (5)  
AIPC 32-11-22 Fig. 1

 C.
Access

 (1)  
Location Zone
 735 Wing Landing Gear, LH
 745 Wing Landing Gear, RH

 D.
Procedure

 S 224-036
 CAUTION: MAKE SURE THAT YOU DO NOT MOVE OR DAMAGE THE WING GEAR TRUCK
_______ SENSORS OR TARGET BRACKET. IF THE TARGET BRACKET OR SENSORS ARE MOVED, THEN THE AIRPLANE SYSTEMS MAY NOT RECOGNIZE AN IN-AIR CONDITION.
 (1)  If the sensor or target bracket is moved or damaged, then do the task to measure the wing landing gear truck sensor clearance (AMM 32-61-22/201).
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